On 12/14/16 3:41 AM, Heinz Nimmervoll wrote: >>> - How is it possible, that even the magic number (and everything else) got overwritten? >>> - Why could it ever be overwritten? >> I don't think anyone here can tell you what happened, it is almost certainly not >> an ext4 bug. Could be a driver bug, or an admin running a stray "dd" command, >> or some other utility gone astray, or ... anything, really. > I can rule out that it was the dd command. Eric, do you think it > could also be a problem about the SD-card and wear levelling (just a > guess)? Ok, now that Darrick has pointed out that it's inode data, I am slightly less sure that it is "almost certainly not an ext4 bug" :) Still, I don't recall any other reports of this type of corruption, so I think it's quite possible that it's a problem outside of ext4. Depending on how hard it is to reproduce, you might consider retesting several sd card types to see if it is hardware-dependent. -Eric -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
